In the fig. the potentiometer wire
AB of length
L & resistance
9 r is joined to the cell
D of e.m.f.
ε and internal resistance
r. The cell
Cs e.m.f. is
ε/2 and its internal resistance is
2 r. The galvanometer
G will show no deflection then find length
AJ:
![1021093_ef41eb13140a4980a477c16f25f04a7e.png](https://search-static.byjusweb.com/question-images/toppr_invalid/questions/1021093_ef41eb13140a4980a477c16f25f04a7e.png)